Compositions and methods for cleaning contaminated articles
AssigneeHoneywell International Inc.
InventorsGary Knopeck, Rajiv R. Singh, Kane Cook, Ian Shankland, Harold Kieta
Life of this patent
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Abstract
Disclosed are compositions and methods for cleaning contaminated articles based on the provision of a zeotropic composition comprising (a) at least one flammable solvent having a boiling point at a first pressure; (b) at least one first nonflammable solvent having a boiling point at said first pressure which is less than about said first pressure boiling point of said flammable solvent; and (c) at least one second nonflammable solvent having a boiling point at said first pressure which is greater than about the first pressure boiling point of said flammable solvent.
Claims36
A method for cleaning an article containing contaminants comprising:
- (a) providing a zeotropic solvent composition comprising at least one flammable solvent having a boiling point at a first pressure, at least one first nonflammable solvent having a boiling point at said first pressure less than about the first pressure boiling point of said flammable solvent, and at least one second nonflammable solvent having a boiling point at said first pressure greater than about the first pressure boiling point of said flammable solvent;
- and
- (b) contacting the article with said zeotropic solvent composition to remove at least a portion of the contaminants from said article.
A zeotropic solvent composition comprising in a zeotropic relationship:
- (a) at least one flammable solvent having a boiling point at a first pressure;
- (b) at least one first nonflammable solvent having a boiling point at said first pressure which is less than about the boiling point of said flammable solvent;
- and
- (c) at least one second nonflammable solvent having a boiling point at said first pressure which is greater than about the boiling point of said flammable solvent.
A method for cleaning an article containing contaminants comprising vapor degreasing said article in the substantial absence of any flammable vapor or liquid phase, the method comprising the steps of:
- (a) providing a zeotropic solvent composition comprising at least one flammable solvent having a boiling point at a first pressure, at least one first nonflammable solvent having a boiling point at said first pressure less than about the first pressure boiling point of said flammable solvent, and at least one second nonflammable solvent having a boiling point at said first pressure greater than about the first pressure boiling point of said flammable solvent;
- and
- (b) contacting the article with said zeotropic solvent composition to remove at least a portion of the contaminants from said article.
Dependencies are inferred from the claim text.